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553

Centuries: 5th century - 6th century - 7th century

Decades: 490s - 500s - 510s - 520s - 530s - 540s - 550s - 560s - 570s - 580s - 590s

Years: 548 549 550 551 552 553 554 555 556 557 558


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Photosynthesis

... as a tracer label to follow the fate of oxygen atoms during photosynthesis. Light-dependant reaction The first stage of the photosynthetic system is ...

 
 
 
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